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Finding the Fourth Proportional to 79,699.84, 109,989.18 and 45,717.92

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Solution

The fourth proportional to 79,699.84, 109,989.18 and 45,717.92 is: 63,092.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,699.84 : 109,989.18 = 45,717.92 : x
  2. Step 2: Convert to fraction form
    79,699.84/109,989.18 = 45,717.92/x
  3. Step 3: Cross multiply
    79,699.84x = 109,989.18 × 45,717.92
  4. Step 4: Simplify right side
    79,699.84x = 5,028,476,532.11
  5. Step 5: Solve for x
    x = 5,028,476,532.11/79,699.84
  6. Step 6: Final answer
    x = 63,092.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.